Inner sole



May B4, 1940.

M. N. MARGOLIN INNER SOLE Filed Dec. 18,v 1959 721/6701107". y /f/ayalne /Varr/f Patented Moy 14., 1940 ParlazNT OFFICE- INNER soLE Morris N. Margoiin, chicago, nl.

Application December 18, 1939, Serial No. 309,783 z claims. (ci. :i6- 3) This invention relates to improvements in inner soles of shoes, and particularly to inner soles of the class having a substituted material inserted and combined therewith Ato provide a limited area of greater resiliency and flexibility.

Inner soles of this class have heretofore been known and in general provide for the insertion of some resilient material, such as rubber, sponge rubber, or other suitable material into an opening formed in the fore part for the purpose of providing better metatarsal support, greater flexibility, and general increased comfort in thewearing of the shoe.

'Ihe desirability and importance of making provision for breathing of the shoe and the provision of means for permitting free penetration of air particularly through. the insert material has also been recognized. This has generally been accomplishedv heretofore by means of perforations extending through the thickness of the insert material. Such provision has, however, been largely ineiectual for the reason that the perforations become collapsed or closed in use, particularly when formed through a sole thickness of resilient material, and have required insertion of non-resilient bosses or the' like expedients which introduce protuberances'and add elements of undesirability and discomfort which the in- Sert was primarily intended to eliminate.

Likewise it has been recognized that although it is desirable to utilizev inserts of substantial surface area on the fore part of the inner sole, dimculties in the manufacture and assembly have been encountered due to distortion of the apertured inner sole when being worked upon in the construction of the shoe resulting in displacement of the insert, the requirement of temporary retaining means with attendant inefficiencies and uneconomical operation, and the added tendency toward displacement vand distortion during use of the shoe.

It is therefore an object of this invention to provide an inner sole of the class having a substituted material in the forel part thereof for aiding in metatarsal support, flexibility, resiliency I and general improved comfort wherein breathing means are provided without the requirement for 'additional perforation maintenance means and which atthe same time provides for an increased breathing area and effective ventilation means.

Another object is to provide the fore part of the inner sole with a plurality ofapertures extending over an effectual surface area thereof and a unitary substituted ,material insert therefor which will 'render assembly andinterlodging of the respective portions simple and expedient and which will prevent distortion during assembly and use without the requirement of temporary or permanent retaining means. 1

. Other objects relates to economies of operation and construction and the details and arrangement of parts which'will be apparent from A a consideration of the following specification and drawing, wherein: Fig. 1 is a fragmentary longitudinal section 'through' a shoe illustrating my improved construction. y

Fig. 2 is a plan view of the fore partrof an inner sole made in accordance with my invention, on the line 2-2 of Fig. 1.` y Fig. 3 is a section on the line 3-3 of Fig. 2. Fig. 4 is a section on the line 4 4 of Fig. 2.4 Fig. 5 is a bottom view of composite inner sole portion shown in Fig. 2. l

Fig, 6`illustrates the apertured portions of the inner sole adapted to receive the unitary insert and overlay.

Referring to thedrawing, the shoe I0 conventionally comprises the outer sole II, inner sole I2, and a stockinglining (not shown), overlying the inner sole. The inner sole generally is formed of leather, and instead of providing a single vaperture for the reception of `the insert, I provide va plurality of apertures, preferably longitudinally spaced and substantially aligned on the fore part of the inner sole, or as illusbetween the marginal side portions of the inner sole apertured area servesto act as means for preventing distortion of the inner sole byv reason of the aperturing thereof, particularly during the shoe assembly, while at the same time permitting the insertion of the metasarsal cushion support without detriment thereto.V As a matter of fact this construction serves to more fully at all times retain the insert cushion in proper position,v and serves as a means for preventing marginal displacement and twisting .movement during use of the shoe.

'I'he insert which may be of soft rubber, sponge. rubber. orA the like resilient and flexible material 2 Y comprises the overlay portion I6 and the d epending cushion portions I1 and I8, the whole of the insert being integral. The overlay portion I6 of the insert is formed to have a surface extent embracing all of the apertures and to overlie the marginal vportions thereof, terminating -in a tapered and converging edge, as at I9. The cushion portions I1 and I8 are of a contour adapted to snugly lit within the apertures I3 and Il respectively, and thus the composite inner sole Vcomprises the overlay I6 embracing substantially the major portion of the fore part of the inner sole, and having unitaryl integral downwardly projectingcushions, in substantially symmetrical aligned relationship to the overlay, but withal spaced apart-bya unitary cross brace, which not only braces the apertured inner solebut also serves to more securely engage, retain and position the respective cushions. y

`It will. be further noted that each of the cushions Il van'd I8 are formed of a plurality of spaced apart sectors or projections, or the y cushions may be considered to be divided into a plurality of 'spaced apart areas by means of the channels 20 which extend substantially longi tudinally and transversely of the shoe, thus giving added flexibility along the lines of natural flexing of the shoe in use, and may permit the vuse of cushioning material heretofore considered unsuitable. A'li'he insert also comprises breathing or Ventilating means formed in part by the perforations ZI which extend through the overlay I8 land open downwardly into the channeled areas l 2|! to form therewith an enlarged air circulation space. .It will also readily be seen that since the perforations 2| `do not extend through the entire thickness of the cushions I1 and Il, iiexing and compression will not pinch or collapse the perforations and without the aid of supports be at all times in full communication with the channels and in addition each perforation will be in communication with the entire channeled area ofA breathing and ventilation.

I claim as my invention:

its respective cushion to provide a` Imaximum of 1. An article ofthe class described comprising an inner sole having a plurality of apertures` formed in the fore partthereof, adjacent apertures being spaced apart by a transversely extending integral inner sole portion, a unitary overlay on said inner sole embracing all of the apertured area thereof and resilientilexible inserts integral 'with said overlay depending therefrom and fitting Within said apertures, the said inserts being" divided into a plurality of spaced'apart sections and the said overlay being provided with a plui rality of perforations opening downwardly between said sections.

2. An article of the class` described comprising an inner sole having a plurality of apertures formed in the fore part thereof, the said aperversely and the said overlay being. formed with. a 35 Y plurality of perforations extending therethrough ,Y and into the channels formed by said grooves.

MORRIS N. MARGOLIN. 

